DPA MMA6000 User manual

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CONTENTS
Technical Description 2
Typical Applications 3
Battery Connection 4
Specifications 6
Service and Repair 8
Warranty 8
CE Marking 8
USER’S MANUAL
Miniature Microphone Amplifier
Type MMA6000

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2
TECHNICAL DESCRIPTION
The MMA6000 is a high quality miniature microphone amplifier and
power supply for two DPA miniature microphones.
The MMA6000 is a front-end device that provides two independent
identical channels in one rugged box. The gain settings are made indi-
vidually for each channel.
The miniature microphone amplifier can be operated either by internal 9 V
battery or, optionally, by the use of an external 12 to 30 V DC power
supply. Battery and power supply unit are not included.
A 3-colour LED indicates the power mode:
green (flashing): battery OK;
red (flashing): battery low;
orange (steady light): external power.
The inputs are fitted with MicroDot connectors. These connectors
also provide the supply voltage for the microphones. The gain setting
is obtained by a 16 position switch providing steps of 2.5 dB in the
range from 0 dB to 37.5 dB. Please notice the possibility of counter
clockwise switching from 0 dB to 37.5 dB gain.
A low cut switch-in filter (common for both channels) inserts a 12
dB/octave, 100 Hz low cut.
The output is a 3.5 mm stereo Mini-jack connector.
The attached clip makes it ease to place the MMA6000 on a belt,
strap or bag pocket.
Warnings:
If you want to summarize the two outputs in one cable, only use
DAO0137.
The specifications and tolerances listed, as well as performance and
stability of the MMA6000, are only guaranteed when using the dedi-
cated cables from DPA Microphones.
DAO 0135
(stereo mini-jack/
stereo mini-jack)
DAO 0139
(stereo mini-jack/
phono)
MMA 6000
DPA miniature
mics/headbands
Non-professional recording
2 ch. input/added out
Professional recording
MiniDisc, DAT, PC,
DV cam or similar.
Connect to line input
DPA miniature
mics/headbands DAO 0137
(stereo mini-jack/
1/4" mono jack)
MMA 6000 Mixer/amplifier
DAO 0136
(Stereo mini-jack/
2 x 1/4" jack)
DAO 0138
(Stereo mini-jack/
2 x XLR)
MMA 6000 Mixer/amplifier,
Pro camcorder, DAT
or similar
DPA miniature
mics/headbands

Please note that rechargeable batteries can be used with the MMA6000,
but with reduced maximum output level. The batteries must be
charged outside this unit.
Be aware that the battery is best mounted with the terminals orien-
ted towards the lid.
If you don't intend to use the MMA6000 for a longer period, remove
the battery to protect the MMA6000 from battery leakage.
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BATTERY CONNECTION
On the rear of the box a sliding cover is protecting the battery com-
partment. Slide the cover fully to the opposite side and use a small
screwdriver or the like to open the lid. Install the battery with the
connector oriented against the lid. Whenever the external power is
used, the internal battery is by-passed.
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Front view
on/off
left input right input
left ch. gain battery indicator right ch. gain
low cut
sliding cover
external power
output
Rear view

Other:
Battery
9 V type IEC 6 LR 61 /JIS 6AM6. Alkaline or rechargeable types
Ni-MH or Ni-Cd.
Battery life time
>24 hours (professional quality Alkaline batteries within temp.
range)
External power
12 – 30 volt DC, maximum 50 mA
Connector for external power
2.1 mm DC-connector, Tip: Positive, Sleeve: Negative
Battery indication
Green LED (ashing): Battery OK
R ed LED (ashing): Battery low
Orange LED: External Power
Te mperature range
-10°C to +50°C
Box
Aluminium, black powder nish
Dimensions (l x w x h)
1 23 x 85 x 35 mm
4.8 x 3.3 x 1.4 in.
W eight (w/o battery)
235 grams (8.30 oz.)
Accessories Available:
DA O0135 Stereo Mini-jack, 1 m (39 in.)
DA O0136 Stereo Mini-jack - 2 x 1/4 mm Jacks, 5 m (16,4 ft)
DA O0137 Stereo Mini-jack - 1/4 mm Jack, 5 m (16,4 ft)
DA O0138 Stereo Mini-jack - 2 x male XLRs, 5 m (16,4 ft)
DA O0139 Stereo Mini-jack - 2 x phono, 1 m (39 in.)
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SPECIFICATIONS MMA6000
N o. of channels
2
Controls:
Po w er On/O
Low cut
Switchable: Flat or 100 Hz, 12 dB/octave
Gain, stepwise adjustable
0 dB–37.5 dB in steps of approx: 2.5 dB
Input / output:
Input connectors
2 MicroDots
Input impedance
>3 kOhm
Output connector
3.5 mm Mini-jack, stereo, Tip: Left Ch. Ring: Right Ch.
Output impedance
<50 Ohm
Max. output level
+/- 1,5V peak before clipping
Equivalent input noise
At 0 dB gain
<3 µV (RMS A-weight)
At 37 dB gain
<1,5 µV (RMS A-weight)
Frequency range (Flat)
20 Hz – 20 kHz ( +1/-1,5 dB),
Cross talk
< -60 dB at 1 kHz
Distortion (THD)
<0.03%
Microphone power:
Fits all types of DPA miniature microphones and headbands
only.
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SERVICE & REPAIR
Products from DPA Microphones are extremely stable, and there
should not be any significant change in the specifications with time
and use. If, however, you are not totally satisfied with the characteris-
tics exhibited by these products, contact your nearest
DPA Microphones representative for further details of service and
the repair facilities that are available.
DPA Microphones has a maximum seven working days in-house service
policy, usually ensuring that no more than seven working days will
elapse from the day we receive the item for service to the day we
are ready to return it to you. Please contact DPA Microphones for
your nearest representative on:
TEL: + 45 48 14 28 28
FAX: + 45 48 14 27 00
You can also get in touch with DPA Microphones at:
[email protected]
or visit our website at:
www.dpamicrophones.com
WARRANTY
All products from DPA Microphones are covered by a two-year limited
warranty on both mechanical functionality and documented specifi-
cations as long as the items are not mistreated, abused or modified
in any way. In case of a warranty claim your invoice is your warranty
registration.
CE-MARKING
The CE-mark guarantees that the product conforms with relevant
Directives approved by the European Commission.
EMC Directive: 89/336/EC, amended by 92/31/EC and 93/68/EC
Low voltage Directive: 73/23/EC, amended by 93/68/EC
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Product features and specifications are subject to change without notice.